Last week we added Apple CEO Tim Cook and SpaceX and Tesla Motors CEO Elon Musk to the speaker roster at our 11th D: All Things Digital conference, which takes place in Rancho Palos Verdes, Calif., on May 28, 29 and 30.

And because we want to ratchet up the interviews to 11, we are now announcing a trio of top entertainment managers, who have also been investing in tech in a big way: Troy Carter, Chairman and CEO of the Atom Factory; Guy Oseary, partner of A-Grade Inc.; and Scooter Braun, founder of SB Projects. Respectively, the three manage Lady Gaga, Madonna and Justin Bieber.

In a recent Billboard piece about the three, it noted: “Billboard Boxscore calculates their 2012 touring revenue at $582 million combined, and the trio’s combined album sales stand at 83.5 million units and digital singles at 89.1 million, according to Nielsen SoundScan.”

That’s a big deal, but perhaps more potential could eventually come from their other activities.

Braun, who has engineered Bieber’s enormous social media presence online (close to 39 million followers on Twitter), has also spent a lot of time perusing the investing scene. Among his investments: Stamped (sold to Yahoo), Spotify, Uber and Pinterest. He also represents perhaps the most viral of entertainers this year: Psy, the infectious Korean pop star, whose video and music hit “Gangnam Style” now has 1.6 billion views on YouTube. It’s not a surprise that Universal Music Group has recently appointed Braun entrepreneur in residence.

Oseary has had a similarly varied career, from managing Madonna to co-founding Maverick Records to the most recent creation of an investment fund with actor Ashton Kutcher and businessman Ron Burkle, called A-Grade. That group has invested in a number of interesting startups, including Airbnb, Path, Fab.com and Tinychat. Oseary has put his own money in a number of other ventures, too, and has been outspoken on the changing nature of the entertainment business.

Carter is certainly no slouch. In addition to engineering Gaga’s massive online presence, via the Little Monsters fan site on Backplane, a social networking platform, he has also invested in a range of companies, from Rap Genius to Warby Parker to Pop Chips to Summly (the news reader that just sold to Yahoo). Atom’s motto on its site is perhaps both appropriate and also refreshing from a music industry player: “Discover. Develop. Disrupt.”

Carter was so good onstage at D: Dive Into Mobile that we invited him to big D immediately and asked that he up the game by bringing along his two colleagues. It should make for an very disruptive session.

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